Silas h



sind @ji-fitr,

Laim Patent No. 101,425, daad April 5, ism.

mwa- IMPROVEmlfT IN" STOVALVES.

The Schedule referred to in these Lettera Patent and making part of the same.

To a!! whomt't may concern:

Bc it known that I, SrLAs H. BROWN, of Troy, in the county of Rensselaer and Sta-te of New York, have invented certain new and useful Improvements in Stop-Valves for water, steam, and other conduit pipes; and I do hereby deciare that the following is a fullrand exact descriptionof the same, reference being had to the accompanying drawing and letters of reference marked thereon, making part of this specification, in which- Figure l is a vertical longitudinal section of a pipe and valve-box, with the valve closed;

Figure 2 is a vertical cross-section of iig. 1.

Figure 3 is a vertical longitudinal section of a pipe and valve-chamber, with the valve opened;

Figure 4 is a separate view of the valve-cam;

Figure :"1 shows the respective cam-sides of the valve;

Figure 6 shows a modification in the manner of operating the closing-cam; and

Figure 7 is a vertical section thereof.

The same letters refer to like parts in each of the said figures.

My said invention consists inthe construction, ai'- rangement, and combination with each other of certain mechanical devices, in manner substantially as hereinafter fully described and shown, thereby con-` stituting au improved stop-valve, whereof the principal distinguishing features consist in the employment and arrangement of a double cam between the respcctive parts of the stop-valve, which double cam operates to shut and hold said valveiight ou its seats; and

It also consists in the combination and arrangement of the respective devices actuating said cam, with and between said respective parts of the stop-valve, so as to move therewith when opened or lifted, and thus leave no obstruction in the passage-way.

To enable others skilled in the art to make and use my said improved valve, I now proceed to fully describe its construction and operation. y

In the accompanying drawing- A indicates a valve-box or chamber of a conduit pipe, B B, which is provided with the respective valve-seats H H', arranged opposite each other, as shown. Y

l/Vithin the said chamber A there is arranged the stop-valve, which is moved therein to open and close the passage-way of the pipe, by means of the screwstem or rod E connected to said valve by a button, i; and socket g, substantially as shown, and 'turning in a nut at the top of said chamber A.

'lhe stop-valve is made in two nai-ts (el and il.

The inner side of each partis recessed, substantially as shown at f, (see iig. 5,) for receiving the double cam D with its journals a a, and arms or projections there- At the lower side of the part C of the valve there are made guide-holes or slots, and arranged so as to slide or be movable therein are the cam pins or rods c c, substantially as shown in the drawings aforesaid.

These' several parts of the valve are now arranged and combined together for use by placing said campins or rods e c in their places in the part O, `then arranging the double cam D in its recess f, with its arms b b over the heads of thecam-pins e e.

The operating screw-rod or stem of the valve is then placed in position, andthe other part O of the valve put thereon. The valve is then slipped into its box A, and the cover-plate thereof bolted fast to said chamber.

The valve is operatedto close it tight on its seats H H by turning a wheel or lever handle of said screwstem, which drives the valve down and causes the aforesaid cam-pins e c to rest on the bottom part d ll of the valve-chamber A, so that the further movement of the valve causes the said pins e e to slide or move, and bring their heads in operative contact with the cam-arms?) b, thereby moving or turning the cani faces on and against the respective parts Gand O' of the valve, which thus closes and holds it tight on its seats H H', in manner substantially as shown in the annexed drawing.

The valve' is opened by drawing it with all its operative parts into the upper part of its chamber A, by means of its stem E aforesaid, thus leaving an unobstructed passage-way.

Figs. 6 and 7 of the annexed drawing show a modification in the manner of actuating the arms or projections l1 b of the double cam D.

instead of the sliding cam-pins e e moving with the valve, as before described, fixed projections, h h, are made on each side of the valve-chamber A, substantially as shown, upon vwhich the said arms or projections b l1 of the double cam D, as the valve is closing,

strike, which shuts tight the valve, in manner as before done.

Having thus described my invention,

.What I claim, and desire to secure by Letters Patent, is-

1. The employment and arrangement of the double cam D, between the respective parts C and C of the stop-valve, substantially as and for the purposedescribed.

2. The combination with each other of the valve parts C and C', the double cam D, the arms or probe closed ou its seats by the action of the double cam D, pins e c, and stem E, and when opened to carry said cam and pius with it into its chamber A, there- ,by leaving a clear passage-way, as described.

SILAS H. BROWN.

Witnesses J. J. SAVAGE, J. L. BARNEY. 

